I've wondered for years what to do with that costume and this is so clever.
The only improve I'd suggest is black/red Robin shoes or goblin boots.
WANTED: Dick Grayson SI trousers; gray AJ Mustang horse; POTA Fortress signal-flasher--top mirrored portion or mirror sticker; POTA Forbidden Zone prison doors, walls, bar; minty Wolfman tights; mint Black Knight sword; minty Launcelot boots; Lion Rock (pale) Dracula & Mummy heads; Lion Rock Franky squared boots; Wayne Foundation blue furniture; Flash Gordon/Ming (10") unbroken holsters; CHiPs gloved arms; POTA T2 tan body; CTVT/vintage Friar Tuck robes, BBP TZ Burgess Meredith glasses.