Too much speculation is not good, let's wait for the result of this fight, and let's see how Crawford and Spence would react to a possible big fight. AFAIK, Crawford is already willing to fight Spence, so if Spence would say no, people will lose respect for him as a champion.
for reference, ; https://www.boxing247.com/boxing-news/terence-crawford-calls-for-errol-spence-fight/206552
Exactly, too much speculations but the real score will be unfold when the battle is going on inside the ring. Let's see how Spence will going to handle the fight against Ugas and hopefully a Crawford vs. Spence battle will be given a chance to happen in the near future. But as of now, let's focus on what is the scheduled fight and let's witness who's from the two great fighter will be the winner. Well, it's undeniable that Spence really win the heart of many boxer fans.
Spence seems to have not shown his interest when he was challenged by Crawford. I guess when Crawford challenges him, Crawford is still working with the Top Rank, but now that he promotes himself, maybe they can adjust the purse sharing just to make this awaited fight happen.
But you are right, let's wait first for the outcome of this fight.