The original background looks something from a 90's platformer and considering you went the classic look of Vector, I'd say that's perfect. Considering a snake that large, I'm surprised there are a couple of badniks spectating as I'd imagine they'd be crushed by that serpent, as well. It doesn't look to be chummy with anyone else in that image. If I had even the tiniest gripe about this, it's that one can read "Sonic the Hedgehog" right under "Happy New Year" when Vector is very much the central figure of the artwork. He deserves to have his name on display rather than Sonic.
"you should totally watch the anime it's a personal classic of mine"
I did watch Shaman King when it aired during the Saturday morning FoxBox cartoon block but it left no meaningful impact upon my second-rate memory, and I believe there was a continuation or reboot a few years ago but, again, since I didn't get much out of it the first time, I had no desire to follow that. Now, convince them to swap out Yoh for Vector and I'll definitely check it out.
Hopefully, you'll enjoy an interesting year in 2025 (the good kind). I'll gladly settle for an "uninteresting" one this time, if possible.