The helmet to the far left of Clark Kent's glasses could be Mr. Combustible's helmet. It has the general shape of his lightbulb-helmet, and doesn't look like it'd be Mr. Freeze's because of the coloration. Still a possibility, though, because the lighting in the scene is quite low.
The object to the immediate left of Clark Kent's glasses looks to be a splinter of wood to me, which would likely belong to The Ventriloquist's puppet Scarface. Less likely is a splinter of another ventriloquist Shauna Belzer's doll Ferdie. It alternatively looks like it could be a needle, in reference to Scarecrow's needle gloves (a la Freddy Kreugar) he dons in multiple incarnations.