@Mike-Babich You have a good start here, though I think you could push it even further to increase the excitement/tension.
Since the griffin needs to be the focus of the illustration, I would put more separation between it and the tower, taking the griffin higher above the tower, with the guy running standing at the top of the tower waving whatever it is he is holding.
Stretch out the griffin's legs and neck so he looks more like he is in flight.
You also need to fix the right wing, as it looks like it is more part of the rider than the griffin.
The rider's left arm would have to be super long to be able to reach around the griffin's neck like you have it. Maybe have the rider holding reins.
Above all else, your story needs to be super clear as to what is actually going on. You can fix all this other stuff, but if you don't have a clear story, then the illustration won't work.
look forward to seeing updates.