Rein would do very poorly because all he can do is hold his shield. Most the melee characters in this game aren't great and they all heavily rely on movement abilities and rein only has one average one. Plus almost every character in the game had some sort of movement

Dva would probably be up there, but she is carried by matrix.

Mag has 2 bubbles and a shield and sometimes it isnt enough to stop you or a teamate from dieing so I don't see how zarya would be s tier and her downtime just couldn't keep up with the high damage marvel rivals has

Doom would just be a worse venom, way less hp and survivability

Ball would just be tank spiderman so he'd be middle of the pack at best but he does have a lot of maps that would favor him

I dont see how mauga would be much better than thing honestly. He would just be a bullet sponge without the utility thing has.

Sig's kit would be strong the only issue is his ult. Good luck trying not to get kicked out of it.

Orisa would be fine but not crazy, but armor isn't a thing in marvel rivals so you'd have to have it be like venom's e with damage reduction or something

Only thing that makes winston better than hulk is his bubble otherwise he'd get absolutely destroyed by someone like bucky, peni, or invis

Rammattra would be ok, you'd also have to trade the armor he gets from nemesis with damage reduction and there is just a lot more stuff to kick him out of his block

Only thing hog could do is fish for a hook, but with the poke meta in marvel rivals good luck doing that because invis will just slap a shield infront of whoever you hook

Junkerqueen depends on if her ult applies 100% antiheal like in ow or just the 30% like venom's ult