Peter Laird's TMNT blog: BLast from the Past #551: December 6, 2007: Re: TMNT sub-randing for season 7, December 7, 2007: Re: TMNT sub-randing for season 7, and December 8, 2007: Re: TMNT157 1st draft
Shredder (Teenage Mutant Ninja Turtles) - Wikipedia
Request - TMNT 2007 'What-If' Shredder by KrytenMarkGen-0 on DeviantArt
In TMNT (2007) a shelf seen at the end of the movie contains references to the other Turtle film's such as Shredder's helmet, TGRI can of ooze, and the time scepter. :