If Rogla will switch teams, from overall dramatics point of view, it can only be Ineos. And then to win the Tour with Ineos in 2024. This could only be matched by something like signing for Eolo Kometa and to win the Tour in 2024 with EK.
But obviously real life is a different story. All sort of interests involved. For example i am not sure Remco is all that keen on riding for JV. So behind the scenes likely all this scenarios with different riders and teams are in the talks.
Rogla wants to be sole leader at the Tour in at least the next two seasons. In a team that can offer him good support.
Current team doesn't want to provide that any more, due to other interests, so he must look elsewhere. For current team then best to sign Remco, as if Jonas drops in form, motivation ... They can quickly land in 0 GT's won per season.
All in all i am in it for Rogla. So hopefully when the cards get dealt, he will be in a good position to win again.
Until then best to annihilate in Italy!