Itallics for likely signings in those teams.
Factory Yamaha - I expect a new big name sponsor
Fabio Q
Alex Rins
Yamaha Satellite Team - TBA
Factory Honda
Luca Marini
LCR Honda
Johann Zarco
Ai Ogura
Factory Ducati
Pecco Bagnaia
Marc Marquez
Pramac Ducati
Fermín Aldeguer
Gresini Ducati
Alex Marquez
VR46 Ducati - Could go to Yamaha?
Marco Bezzechi
Factory Aprilia
Jorge Martin
Maverick Vinaeles
Trackhouse Aprilia
Joe Roberts
Raul Fernandez/Miguel Oliveira
Red Bull KTM
Brand Binder/Enea Bastianini - could demote Binder for Bastia at red bull KTM
Pedro Acosta
Red Bull GasGas Tech3
Brad Binder/Enea Bastianini
Likely to step up from Moto2
Joe Roberts - American, likely ends up at trackhouse
Sergio Garcia
Ai Ogura - likely ends up taking Nakagami's seat.
Joan Mir - May retire rather than stay at Honda if he can't get another ride. If he is intent on leaving Honda, tackhouse, yamaha, pramac and gasgas may be options?
Jack Miller - Unlikely to be kept at KTM. Honda might like him as their in season test donkey given his experience on KTM and Ducati. Otherwise I think it is off to WSBK.
Fanco Morbidelli - Who knows, just had his best result of the year. Pramac may keep him, otherwise VR46 could throw him a lifeline?
Digi - outperforming his teammate currently, also outperforming Franco M on a year old bike. Could Pramac throw an offer towards him?
ETA: Martin and Bastia are unlikely to be getting upgrades through the season. Leaving Ducati with only 2 bikes to give upgrades to. It will obviously have a negative impact on Martin, though possibly not enough that he can't win the championship. Gigi is an engineer first and foremost and will be wanting to start the program with his new riders whoever they end up being as quick as possible. I think Ducati will start giving upgrades almost immediately. They want to ensure one of the riders they have next year wins the championship, they achieve this by giving Pecco upgrades and not Martin/Bestia, giving MM who is their likely replacement for Bestia upgrades, making him more competitive and able to put his bike 1st and/or between Pecco and Martin more often. It could be good news for DiGi as well, who you would think is in the boxseat for taking the spare Pramac bike, so he could get upgrades during the season.