I think it's time to start a new thread for this year. Remembering how things went between Rossi and Lorenzo when they rode for the same team I'm intrigued by:

Rossi and Yamaha agree to take time to decide future plans

Following discussions between Yamaha and Rossi, the Italian will take until mid-2020 to make the final call whether he will remain an active rider in the MotoGP World Championship in 2021. This time frame was requested by Rossi to evaluate his competitive speed compared to the MotoGP™ grid only after completing the first seven or eight races of 2020.

and:

Jorge Lorenzo returns to Yamaha

Starting from the MotoGP shakedown test, held in Sepang, Malaysia from 2-4 February, Lorenzo will ride the YZR-M1. He will also take part in other Official IRTA Tests and some private Yamaha tests this year, with the sole aim to help Yamaha‘s engineers with the 2020 MotoGP development. The Spaniard is the perfect man for the job as he is known for his smooth, precise riding and clear feedback. He will be supported in his search for innovation by Silvano Galbusera, who will be Crew Chief for Lorenzo in the Yamaha Factory Racing Test Team.

So far, no wild card rides are planned for Lorenzo in 2020, but Yamaha is open to the possibility, should he decide to race again.