Very subjective since some time ago I randomly asked a guy if he knew what Alice in Wonderland was and he only knew the story existed from them Johnny Depp movie
However, based on my little exercise, I am not going to assume that everyone only knows 'Alice in Wonderland' from Johnny Depp and not from Lewis Carol or even the Disney animated movie based only on what whoever is immediately around me knows.
However all this is irrelevant. The last Turtle movie was well marketed and promoted so just because you and your co-workers have never heard of it, doesn't mean that TMNT is not already an active and successful franchise.
However I will agree that TMNT was not as popular as Bayformers: