It always surprises me (it shouldn't anymore) how few Smash fans are able to take a step outside of themselves and, should a character they don't personally care about or like get in, just be happy for that character's fans instead of raging about it and screaming "shitty character," "wasted slot," "literally the worst choice," and all that other nonsense.
Having your favorite character get into Smash is an amazing, very special feeling if you're an enthusiast, and raining on a fanbase's parade just because they got a character you don't like is just really ugly, childish behavior. There are about 80 fucking characters in this game. Surely not every single one of those 80 has to appeal specifically to you?
Anyway, I have absolutely zero hype or love for Monster Hunter and especially Doomguy, and if they're actually the fourth and fifth characters, I would be incredibly disappointed but I'll still be very happy for their fans, and vocally so.