The "Association with Nintendo" argument died when Snake was revealed for Brawl. Since then, out of the 71 characters (not counting Echo fighters) revealed for this game, 9 of them are 3rd party characters and you can bet your asses that number is going to grow from here.
This is not 2001 anymore. Smash Bros. has loooong evolved from being just a celebration of Nintendo. It's a celebration of all gaming now.
Hardware Comparison Threads:
Current Thread
Is Hardware Getting TOO Powerful?
Older Threads:
PlayStation/Xbox/Switch: 2022 Edition
PlayStation/Xbox/Switch Hardware Battle: 2021 Edition!
PlayStation 4/Xbox One/Nintendo Switch: 2019 vs. 2020
PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019
PlayStation 4/Xbox One/Nintendo Switch: 2017 vs. 2018
PlayStation 4: 2015 vs. 2016 vs. 2017