I wouldn't bet on something like that; it's subject to too many variables, and I have no idea how such a bet would play out.
I also think this could lend itself to match-fixing, because many people close to the players involved will be able to know the results well in advance, which could lead them to take their money from the bookmakers.
Better let the dust settles and see what's gonna play if you have doubt. Because you will only waste your funds on this. Or if you want, you can bet small and see how it plays.
There are many people who are quite skeptical of a bet like this because indeed some bets have orders that are ready to be worked on so that the outcome of the match is set by the bookmaker.
But that will only apply to local sports betting or those that are not big enough like the official leagues, as anyone known to work together to arrange the course of the match will get fines and penalties.
Regarding the possibility of betting on player transfers, this is entirely at the discretion of the team manager,
But of course it will not be known whether the transfer will be made or not because there are some procedures that will be carried out.
After all, why should you predict who will be transferred, it's better to focus on the match only.