I like the above commentor's Twelve Labors approach to Diana working at Taco Whiz. And was she really gone in space for two years? Man, that would really put a damper on her mission if she disappeared for that long.
As an aside, Donna being Circe would explain why Diana didn't immediately realize Donna's story was a load of bovine feces. She was unconsciously preventing Diana from seeing The Truth.
Diana's eagle shirts with the black pants or star-spangled shirt look very good. She could start her own clothing line with that stuff. Casual super-chic. And while the coconut-shell bra and biker shorts thing suck, I really like her jacket. It would work with a blouse and pants for a casual Wondy costume.
Confronting that crime boss: Damn, Diana's a badass even when she's not punching monsters or lifting buildings over her head. "Hey, you should do this thing for me." "Yeah, okay, sure." I've been reading some Discworld lately ("Men at Arms," if you're curious), so I bet she and Corporal Carrot would get along famously.
Asquith: "I'm a product of the 90s, my whole point is to look scary!" Someone needs to give his jaw an uppercut while he's got his tentacle-tongue hanging out. And how does he talk like that, with the giant tongue and saber-teeth and no lips?