We all know that the originally planned R5-D4 figure for the final wave of POTJ figures was cancelled and changed to R4-M9. Looks like the reason why is right infront of our faces.
R5-D4, according to the official site will be in Episode 2. No information as to what his role is. Possibly a Jedi astromech droid, or maybe he comes into play on Tatooine.
Here is a link to his Bio on the Official site, notice that the list at the top for what movies that he appears in, that Episodes II and IV are both lighted.
R5-D4's Databank File
Looks like, hopefully....we will get both the cool new R4-M9 as well as a more accurate version of R5-D4 as well.
MTFBWY and HH!!
Jar Jar Binks