Background Pony #1CF4
When you realize, Hasbro really did screw up by cutting the franchise 6 months too early and, they could have made another fortune over the past year alone off of MLP:FIM & EqG…  
😒
Spoonlol

O boy.  
That said if there’s one character I expect to make appearance it would be him, considering his been in several generations before
Lupin Quill
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Non-Fungible Trixie -
Chaotic Little Trees - 1000+ images under their artist tag
Verified Pegasus - Show us your gorgeous wings!
Preenhub - We all know what you were up to this evening~
Ten years of changes - Celebrated the 10th anniversary of MLP:FiM!
My Little Pony - 1992 Edition
Wallet After Summer Sale -
A Really Hyper Artist - 500+ images under their artist tag

Lightsaga's Senpai
FUCKIN’ SICK!
deactivated286bd

Fan of Twirax
Iron Storm

Raggedy Man
Spike, Discord, undead Mane Six.
deactivated286bd

Fan of Twirax
TBH. I think making Spike a villain would’ve be a clever move.
GreyGears
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Wallet After Summer Sale -
Artist -
Not a Llama - Happy April Fools Day!

Virtually real pony.
Everyone in G4 is.  
Lazy writing and the magic of resurrection/time-travel/stasis/immortality/freezing-in-some-ice-crevice/etc make everything possible !
Background Pony #7468
Probably not but who knows, maybe he will go greedy again like that one episode (if he shows up at all but that’s also possible if this is really in the future of FiM).
Background Pony #64F5
Where does it say that?
Background Pony #204F
My Little Pony. The Desolation Of Spike.
Background Pony #0694
Don’t see any possibility. Even Luster Dawn has more chance.