Looking at the fact that Saban is adapting Shinkenger for 2011's Power Rangers and it's bound to show by next year, which I assume that Goseiger ends and Goukaiger (if that' ever the real 2011 Sentai for the 35th entry), it can be questioned whether or not Saban should adapt Goseiger after his Shinkenger adaptation ends or not since he's one series late already. I mean, after the end of RPM, Disney remastered MMPR in a way that displeased fans that the series is going to be DEAD and Saban will re-air MMPR unedited.
It's just too early to judge whether or not the next series Goukaiger will be adaptable in a sense, that, if the story of Goukaiger will involve a Decade-like story. But then again, it's no problem if Saban can re-secure Judd Lynn for new ideas. For me, well it has to be thoroughly thought of before jumping into irrational conclusions. :-P
If a Goseiger vs. Shinkenger movie will happen, I wonder if Saban can utilize the movie to introduce the Goseigers as allies and not as a series like he did with Kakuranger footage. Maybe not. I don't think Saban would want to do it again.