Yeah, sure bro you can hope for him and ask for him...
but acting like he's an incredibly likely lock and not keeping your expectations in check is seemingly only frustrating you man. It doesn't seem like a good mindset to be in. Remember ALL those characters you mentioned did get into the next game. All those characters could've gotten in, but time restraints or a creative disagreement stopped them from getting in the first time. You also gotta realize and consider how those characters have always been significantly more popular than Issac as they're tied to bigger series too.
He could just also never ever get in as a fighter, and you have to mentally accept that outcome and you'll enjoy speculation more. I know that about all the series I care about who don't have anything.
And hey, if Issac does get in, you'll feel way better in the long run if you take your hopes with a grain of salt. Aim low and you'll never be disappointed.
I'd be fine and grateful with my favorites series getting literally anything. Even if they never get a fighter. I want them to get something specifically because I feel they're notable enough first and foremost but even something small would be incredibly appreciated. I would be over the moon if they actually put these four specific GTA songs in Smash. I believe that GTA objectively deserves way more in Smash but it's still cool and infinitely better for the series to get something rather than nothing.
Specifically these four tracks:
Yeah, I'm mainly just happy we've gotten so much DLC, to begin with. Speculation is the icing on the cake for me.
Ha! It's still from GTAV so you were close. It's Franklin's friend Lamar, but someone used one of those camera apps to make him smile.