Don't take it too hard. It's not a bad idea. I was underage when Tequiza hit the stores, so I tried a few of them very enthusiastically when it was all I could get. And I will say this...
The flavor combination has potential. Don't overdo it, but I think you could make something good. I'd lean towards something like some mild hops, like tetannananananger, slightly on the spicy side. It could be good.
Keep the flavor light because agave is a subtle flavor. An american lager is about ideal for this.. but a wheat beer could work too.
In Process: Mango Beer, Homebrewers Pale Ale
Bottled/Kegged:Spicy Light Rye, Rice-adjunct Pale Ale, Mild Bourbon Porter, Roasty Stout, Basic Light Mead, Bourbon County Stout Clone
Up Next: Berlinerweiss, Chocolate Raspberry Ale, and American IPA