I wonder, how about Phoenix Wright? Hes a big character, no spirits or other content despite his fame. We have yet to get a Capcom Rep in either fighters pass. And Capcom seems to have plans for the Ace Attorney series, with all the leaks with remasters, localizations, and even AA7. Is it far out to hope for him?
Capcom does seem to be pushing Ace Attorney pretty hard next year and it is the 20th anniversary but it seems like anniversaries don't matter much for smash reps. It's hard for me to talk objectively about Phoenix since he is my most wanted, especially when his competition is the titan of a series, Monster Hunter. Phoenix definitely has the history with Nintendo over MH but we learned with reps like Sephiroth that doesn't count for much anymore. The main ways I can see them picking Phoenix over MH are:
1. The Phoenix Wright series needs promotion more than Monster Hunter. MH sells like hotcakes no matter what, so even if there isn't promotion for Rise in smash, the game will sell like crazy. Phoenix Wright is a popular series but doesn't reach the same numbers as MH, so I can seem them using Smash as a chance to promote the series while they release the TGAA collection and whatever else they have in store. On the flipside, MH would probably sell more of the pass than Phoenix so it's hard to tell.
2. The curveball element. Many are expecting MH to be the Capcom rep from what I've seen, more than Dante or Phoenix. This smash dlc has thrown many curveballs such as having Sephiroth be the Square rep when many were expecting Sora (even though hes Disney), Geno, 2B, Lara, etc. While Phoenix has a lot more people thinking he is likely than Sephiroth, I can still see Nintendo picking him for the surprise element that they believe it will present. I will admit this is a weak argument and could be used for any "not insanely popular" character.
I'm not even going to present the argument of MH already being repped in Smash with Rathalos. I feel like Min Min has destroyed that theory since Springman was also an assist. Hard to tell though since MH also has music and a boss in addition to the AT. Who knows honestly but like I said I would be happy with any Capcom rep. MH, Dante, Phoenix, Viewtiful Joe, Ammy, Arthur, Power Stone rep etc. are all amazing to me, they just have so many amazing characters that sadly aren't repped in Smash.