There have been several scenarios with tanks in them (Stalin's Fourth, Operation Husky, Tunisia, Red Storm, and Winter Sky). Of those, the ones folks seemed to like the best for ground action were Stalin's Fourth and Red Storm.
In Tunisia, Red Storm, and Winter Sky, the core of the ground combat was set aside for dedicated tankers, not pilots pressed into tank service, and that resulted in 15-30 players willing to dedicate to ground combat. Stalin's Fourth pressed most people into GV duty, and we got more in GV's as a result. Some didn't like that, but a lot of people had a great time. I'd love to play in Stalin's again. The terrain wasn't available for a while, but it probably will be at some point.
I think that tank-only might not gather enough participation to make it a scenario. I could run a "This Day in WWII" style event for a tank-only battle. Those are not nearly as full-featured as scenarios but still fun with just about any level of participation. If folks are interested in that approach, here's a topic for discussion:
http://bbs.hitechcreations.com/smf/index.php/topic,342331.0.html