Trying to do a new game from scratch is insanely expensive.
Then they developed with Switch in mind and absolutely ethered the game on other consoles.
And they hired Yukes, who despite having wrestling game expertise, had basically zero next-gen development experience and mostly develop Earth Defence Force spin-offs nowadays.
Then they feature creeped to a battle royal mode, party games, a stat based CAW mode with branching stories...
The game could absolutely cost 10 million. Honestly, 10 million would be fucking paltry for a game of that scale.