As long as we dont low ball the characters the feats count regardless of what era they are from. But they have to be somewhat consistent. If we say specify "Current" or "80s" "90s" whatever that limits the feats. This is 616 Colossus so that last part doesnt count.
That Glads vs Colossus fight, feats can be used from their first appearance to that fight and ends there. Glads is not that old.