I am posting Questions and Answers from Tumblr here that i answered, my Tumblr is private unless you have an account there so my post wouldn't be visible for those who do not.
So let's begin!
Q1:
I feel like Jin arc should be about reuniting with Jun and Working with Kazuya to defeat Heihachi and knowing Kazuya as a man?
Maybe Kazuya could finally be the one to end the generational trauma that Heihachi put though the whole family and become the new paternal figure like Jinpachi.
It could be nice to see Kazuya and Jin bond as Father and Son
A1:
Yeah! i believe that will be the end goal of Kazuya and Jin's character arcs.
Tekken 8, well, at least the story mode, concluded Jin's arc. So i don't think there's much of it left to be honest with you. Maybe we'll see him helping rebuilding the world and travelling with his team, teaching the Kazama way and his mother's teachings, and of course fixing the mistakes he made and make up for the misfortune he caused to people because of his war.
For Kazuya YES i agree with you on that. That would be nice to see. Maybe in Tekken 8 we see the build up for it and in Tekken 9 we see Kazuya's redemption arc and Heihachi and Reina Vs Kazuya, Jun and Jin. Honestly i think Kazuya's arc will be restoring the Mishima clan to it's former glory and redeeming it. He's the only legal Mishima right now. And honestly the only person who can honor Jinpachi as well as the monks as Jinpachi taught him. It would be the biggest fuck you to Heihachi if he restored the Mishima clan with Jun by his side and made their own legacy with better foundations than the old Mishima clan.
Q2:
Does Mikoto have any rivals?
A2:
Ohh! rivals? hmm i am not sure...i guess Ben is considered a rival since they trained together since kids?, as well as love interest i suppose!.
I need to create more ocs huh? but i dunno who, maybe in the future i'll expand on this! for now i have so many things i need to do because of my new job, so please be patient and look forward to this because i am certainly planning things for Mikoto.
Q3:
Any headcanons for Jin?
A3:
Ohh i think i have some
I don't see him being a picky eater, since he'd eat a lot of Jun's food, he has a strong immune system and is comfortable with any taste.
He likes Games but he doesn't consider himself too much of gamer, when he was in high school he would play fighting games or popular games with Xiaoyu and Hwoarang.
In Yakushima his room was decorated with posters of his favorite games and movies. After they were destroyed in Ogre's attack Heihachi took him to a shop to buy merch of his favorite franchises, and decorate his new room in order to make him look good Jin and to the public.
I think this is pretty much canon, but he is not good with girls or romance in general, he gets embarrased with those stuff.
His favorite season is Summer, not because of his birthday but because back in Yakushima he and Jun would spend tons of time together at the beaches of Yakushima.
What do you think? nice eh?. :D
Q4:
Who do you think Vegeta Jr is descendent from?
A4:
I just hope Vegeta Jr is descendented from Bulla's side xD I think her descendant taking after her daddy would be too cute.
And to be honest with you anon, i don't really like Mai x Trunks pairing, at least after thinking about it. It makes me feel a bit uhh uncomfortable? considering their age gap. And personally, i believe Trunks deserves better.