Lego should do something similar to the bat-mite cowl for the battinson figure : r/LegoBatman
Bat-Mite - Wikipedia
Bat-Mite, DC Super Heroes (Minifigure Only without Stand and Accessories) : Minifigure colsh16 | BrickLink
G. Allen Black on X: "#throwbackthursday An all-ages @DCComics pitch I did in 2008 called #GothamMites #Batman #GothamCity #BatMite http://t.co/q4Alceft6g" / X
LEGO DC Super Heroes Minifigure Bat-Mite (Genuine) | eBay