My family went on a SWDAS(Star Wars day at sea) last Jan. I would assume the Marvel day would be similar. My dd and I aren't SW fans at all. My dh did go see the new Star Wars movie that night, but otherwise we didn't do anything that was related to SW. We still had a great time. My dd was 8 yrs old, she doesn't care that much about doing character greetings anymore, so it didn't matter that it was just SW characters that day. We did go to the character breakfast and princess greetings on another day, that was enough for her. If your girls still like all the characters, there will still be lots of times on the other days to see them. Some of the activities in the kids clubs were SW related on that day. It didn't matter to her, she still went and had fun, she even won a SW theme game, despite never seeing any of the movies. Dh and I did a mixology class that day while dd went to the kids club. While dh went to the movie that night, dd and I watch a on-demand movie in the cabin and ate chocolate chip cookies from room service. Your girls could also go to BBB to get a princess make-over on the Marvel day. The pools/slides are always a fun option to do instead of the Marvel activities. Also mini-golf and Mid-ship Detective Agency if on the Fantasy/Dream. Our cruise was a 7 night W. Caribbean on the Fantasy. I don't know which ship the Marvel cruises are on or where they go. But one advantage of going on a SW cruise was we had fireworks for 2 nights, the pirate night and SW night. Don't know if they do that on the Marvel cruises or not, but it would be a special bonus if they do. We aren't Marvel fans either, but it wouldn't stop me from booking a Marvel cruise if the dates/prices were right. Also wanted to add, my dd went to the Pluto pajama party in the kid's club and absolutely loved it. Make sure you check the navigator each day to see which night it will be held on your cruise. Pretty sure they have it on all cruises because it's popular, you don't have to get tickets for it, just show up in the club. We had it on 2 different nights, my dd went both times. Our next cruise isn't for another 7 months, and she's already saying she can't wait to go to it again.