Galaxy Watch 7 trade-in value for Watch 8?

I recently got a great deal on a Galaxy S25 Ultra, which included great benefits for Watch 7. However, I've since heard rumors that the upcoming Watch 8 might have glucose monitoring and a retro legendary dial. I'm now wondering if it would be worth it to exchange my Watch 7 for the 8 when it's released or just cancel Watch 7 now and wait for 8 ?

Any thoughts on this?