I highly doubt it, their current Guilty Gear game is (not counting the licensed Dragon Ball FighterZ game) their most successful game ever.
In addition to Tokon, they're working in several other minor games, some internally developed and other ones published by them but externally developed.
the Marvel game is probably a higher priority for them assuming they had to decide to where to allocate resources.
Well, it doesn't work in that way.
Dragon Ball FighterZ was funded by Bandai Namco, meaning they didn't have to worry about it. It sold over 10M copies + addons, meaning that in addition to fund the game, Bandai Namco paid ARC a shit ton of money as part of the profits generated by the game.
Their recent Guilty Gear Strive is -outside DBFZ- their best selling game ever, so also profitable.
With these profits plus other ones generated by other projects, they fund smaller internlally developed projects or games they publish but are externally developed.
Sony funds the Marvel game, meaning ARC doesn't have to worry about it. Pretty likely will sell even more than the DBFZ game.
So they don't have a money problem. In case of amount of people, having money they can hire people. If they don't want to do so and need to take people from other projects, they'd take them from the other smaller projects they have, which includes other fighting game series.
If they'd need to cancel a game they'd cancel one or some of the smaller games, not their most successful series. If something, they may have rebooted its development to make some key important change they may consider it was needed.