Why so doubtful Funky ?
I am hopeful but also aware that typically vaccine development does not meet with rapid success in the majority of cases.
Typical vaccine development takes on the order of 5-10 years. Obviously there is tremendous incentive to do this one more quickly, but on the other hand, this virus wasn't even known about a year ago, and it most likely isn't done mutating yet.
I hope to [deity of your choice] your optimism is well-founded - but there are still significant hurdles.