I want the Melter, damn it!
I hear you - but considering how dismissive Shane Black was about him I don't think we're gonna see him anytime soon.
I have a big hope that the Black Knight is going to show up in Antman - although I think that will be a big leap too. Thats mainly cos I don't know how they could do him.
I guess he could be another dude in armour (been done) who flies about on a mechanical steed (very chitauri) so perhaps not very original after all. Unless they do the whole Dr Strange, mystical blade, medieval history thing??