It looks like you have mileage to spare on your lease. I would wait if you’re not over. Any dealer can “pull” you ahead by adding the amount of your payments to the new car’s total (gross cap cost). You can go to any dealer and they will offer to pay off the remaining balance (you will still be responsible for lease disposition/damages). If it’s an actual corporate incentive, and the dealer gets reimbursed by corporate, that’s a different story.
Two, you have to do your own research and bring the numbers here. I’m personally not interested in any EV/PHEV car so I’m not motivated to do the research for you. Get MF and residuals from edmunds, and NADAguide/truecar values.
https://forum.leasehackr.com/t/which-sites-do-you-use-to-do-research-updated-07-16-17-library/16434
Third I think that’s a great idea, but only if the dealers are willing to play along. I usually show my face first then start the emailing.