I have a Idea for what Jun's Megekyo Sharingan abilities should be.
Dodomeki:He is able to change the shape and size of any person place or thing. Imagine the possibilities take a rasengan change the shape to a sword make sure it still ways the same and cut through your enemies continually.
Ebisu:This is inspired by Madara's Limbo clones. Basically you can summon various clones that are flesh in blood they are the same strength as Jun and have the same intelligence. Plus if Jun dies and he has a clone active his conscious transfers to his clone.
Simplord_Bam