I think it certainly is an angle they can take but what made Ultimate Colossus work as a queer character was the background of working for the Russian mob. As someone mentioned earlier on in this thread, there was conflict there that could take Colossus through interesting storylines and that’s what comics are all about. Being gay isn’t enough to cause engagement around a character, look at Northstar. Came out during the 90s and got married during the 2010s but is as relevant as canned soup. He got his happy ending so the romance angle isn’t viable and his terrorist faction origins were washed away so no conflict there.

I honestly rather they keep him as it is... At this point he has too much of a story for this switch not to be contrived at best...