It certainly will be much more of a challenge considering the crossover would require collaborations between two entirely separate corporate entities, but it’s not like those types of crossovers are completely unheard of.
It’s a funny idea, but perhaps more of a jokey acknowledgment that a Rick and Morty crossover isn’t on the way for Solar Opposites anytime soon.
They’re certainly a rarer form of crossover, so maybe fans shouldn’t hold their breath on this one happening.
Either that or they do have a real idea they’re playing close to the chest for that day should it ever come.