Wow, sfa, that looks great! It's really cool to see all the various characters in their primary, most recognizable outfits and regalia, without the distraction and uneccessary presence of variants. Very colorful - one of the things that attracted me to the series as a kid (and to this day) beyond the storytelling is the visual quality of the show. It's very colorful, without being gaudy or in-your-face. A subtle burst of color, if you will.
But where's Robin?!
In general, I'd say Robin's an unnecessary character, but he was an undeniable presence in the series and would really help to make that collection look complete (even if he's only in the background, leaving the Dark Knight to take center stage)! Plus, his TAS incarnation is generally one of the least annoying takes on the character.
Also...Batgirl? Maybe not as critical as Robin, but still...for completeness's sake...
Finally, what about the Batmobile? Forget the other vehicles they made (though the normal Bat-cycle and Batwing are pretty cool too), but the TAS Batmobile is definitely important! Though I'd understand if it's a bit big for your current display and setup.
