When searching for information about Disney Cruise Line, the DCL website is always a great resource. However, the Marvel Day at Sea page isn't updated with the latest safety protocols and restrictions, so I'll be making my best guess as to whether some of the listed activities will be happening or not.
Similar to what various Star Wars characters do on a Star Wars Day at Sea, many Marvel characters will be going around the Magic during Marvel Day. This is one of my favorite parts of Star Wars Day at Sea, because you never know who you'll run in to or how they'll interact with you or others. Some of these characters will be appearing in special scheduled character greetings, where guests have to book a time to meet the characters. I'm scheduled to see Iron Man and Black Panther. Because we're in the age of COVID-19, the characters' interactions will likely have to be distanced from guests. This might make it a bit harder to take photos with the characters, but they're super heroes, they can figure something out.
Speaking of characters, it's almost guaranteed that there'll be some Marvel characters in the Oceaneer Club's Marvel Super Hero Academy. Like Star Wars Day at Sea, you can expect to see special Marvel-themed activities in all of the youth clubs.
Another good time to find Marvel characters is the Marvel Heroes Unite deck show. I'm guessing this is a lot like Star Wars Day at Sea's Summon the Force deck show. It'll probably involve a wide range of Marvel heroes and villains in a "grand extravaganza." The DCL website doesn't say anything about fireworks, but videos like the one below show fireworks during the deck show.
While Marvel Heroes Unite looks really cool, will it even happen? The DCL website's Know Before You Go page says that deck parties are currently paused due to DCL's health and safety restrictions, and I would classify this show as a deck party. If it does happen, there may be two different showings, so less people are on deck at a time. I guess we'll just have to wait and see what happens.
The above video features a special show in the Walt Disney Theatre featuring Doctor Strange. It looks like an interactive show, and since it's interactive, it won't be exactly the same twice. Even if you're a Marvel Day at Sea veteran and have seen the show many times, I'm sure you can still enjoy it. I think this show will still happen, as DCL hasn't stopped Walt Disney Theatre shows. There may be multiple showtimes to accommodate everyone, since the Walt Disney Theatre currently operates with a limited capacity.
Another interesting character experience is the Star Spangled USO Show. This is a Captain America show in Fathoms based on the "Star-Spangled Man With a Plan" song from Captain America: The First Avenger. It seems like a lot of fun, and if it's happening on my cruise, I'll probably check it out.
Of course, you can't have a Marvel Day at Sea on a Disney cruise without Disney. In the Mickey & Friends Super Celebration, Mickey Mouse and his friends will be dressed up in Marvel-related costumes.
According to this video, it looks like this event is in the atrium. It looks like it attracts a lot of guests, something Disney doesn't want to do now because of COVID-19, so this may not be happening. Maybe instead of all gathering together in the atrium, Mickey and company will be wandering the Magic, like the Marvel characters will be doing.
During Star Wars Day at Sea, Star Wars movies play all day in the Buena Vista Theatre. This is likely no different on Marvel Day at Sea, as there are even more Marvel movies than Star Wars movies. I'm really hoping they play the new Spider-Man: No Way Home, as I haven't seen it yet, but since it's partially owned by Sony, DCL may not be able to play it because of legal reasons. Anyway, expect to see plenty of Marvel movies showing on Marvel Day at Sea, just maybe not Spider-Man.
In addition to the movies in the Buena Vista Theatre, Marvel TV shows will be playing on Funnel Vision throughout the day.
For more casual Marvel fans, Marvel 101 will be held to give an overview of the Marvel universe. This sounds very similar to Star Wars 101 from Star Wars Day at Sea. I didn't really need Star Wars 101, but I'd probably benefit from attending Marvel 101. Maybe it'll supersize my Marvel knowledge.
While it'll help guests get a fundamental understanding of Marvel, Marvel 101 probably won't be enough for people hoping to win Marvel trivia. The DCL website even says it's "challenging," so it sounds like they aren't messing around.
If you get tired of watching or learning or answering questions, you can always learn how to draw Marvel characters. I'm not an artist, so I probably won't be attending this event, but plenty of people will have a lot of fun drawing at it.
All this stuff is great, but what about when you get hungry? Like Star Wars Day at Sea, there will be themed Marvel menus at the rotational restaurants (however, you'll have to either use the DCL Navigator app or ask for a paper menu). According to the 2020 edition of The Unofficial Guide to Disney Cruise Line, the menus show which Marvel character would choose a menu item. This is not something revolutionary, but it'll make choosing a meal more fun.
Will there be special ship-wide announcements made by Marvel characters? I didn't find an answer to this. During Star Wars Day at Sea, imperial officers came on the announcement system and instructed the guests to report all sightings of rebels. This added a lot to the immersion of the day, and I really hope it's a part of Marvel Day at Sea.
I'm also curious about the Marvel Day at Sea merchandise that will be sold in the shops. A Marvel Day at Sea shirt would nicely complement my Star Wars Day at Sea shirt. After this cruise, all I'd need is a 'normal day at sea' shirt. Disney should start making those!
Marvel Day at Sea seems very similar to Star Wars Day at Sea, but that's not a bad thing! In fact, it's a super thing, because Star Wars Day at Sea is awesome! Since I'm not a super huge Marvel fan, I don't think I'll enjoy Marvel Day quite as much as I enjoyed Star Wars Day, but I'm sure it'll still be super fun. There's a lot of Marvel in a Marvel Day at Sea, and I'm expecting to be surprised with new activities that haven't been done before this year when the day arrives. As long as my family and I can get on the Magic, I'll have a report of super proportions about the day after the cruise. Our cruise is getting super close, and I'm super excited! I should stop before this gets super annoying.