Well, most of the characters I like are either still alive, or not technically dead. Cass Cain never officially got killed off, she just got lost in the reboot shuffle. There is someone who is officially dead I'd like to see back, and that's this guy.
Richard Rider, the late Nova Prime.
Rich had a decent (if obviously and awkwardly shoehorned in) heroic death at the end of Thanos Imperative. It was him and Star-Lord, giving their lives to keep an unkillable Thanos trapped within the collapsing Cancerverse. Except Hickman brought Thanos back (though if he hadn't, I'm sure Starlin would have), and Bendis brought Star-Lord back. Nova's the only one still dead, and that's stupid as hell (every account I've read, Bendis' attempt to explain how that happened in Guardians of the Galaxy's Original Sin tie-in was as bad as I'd expect). So there's no reason for Rider to stay dead.
This isn't me trying to get rid of the new kid, Sam Alexander. I may not have anything for Sam, but I don't have anything against him, either. He can be Earth's Nova (or the New Warriors' Nova), while Rich has all the fun, cool adventures out in space. Or Sam can drive Rich nuts by doing typical impulsive teen hero things. Whatever. I don't want Sam gone, I just want Rich back
I miss this guy. He believes in what the Nova Corps is supposed to stand for, to the point he won't abandon prisoners to an army that will almost certainly brutally kill them for sport. He has enough experience under his belt to know how to talk his way out of it. But he still has enough of that old cockiness he can't resist poking the bear a little bit, because he's confident he can back it up. And he's powerful enough I want him to poke the bear, because I want to see that fight. I was always disappointed we never got to see any payoff between Rich and Blastaar.
First image is from Nova #3, Dan Abnett and Andy Lanning (writers), Sean Chen (penciler), Scott Hanna (inker), Guru eFX (colorist), Cory Petit (letterer). The other two are from Nova #28, Abnett and Lanning (writers), Andrea Divito (artist), Bruno Hang (colorist), Cory Petit (letterer).