Well Ratchet could have left the Galactic Rangers after learning the truth about Qwark, so he might gave back the suit but he still wanted to catch Drek as he would destroy his home planet. From what we have seen from the trailer of the game and the movie there is both night and time in Veldin. Meanwhile Veldin looks yellow and orange in the light but in the dark every rock surface looks black and taking account the similar desing with the original this is probably Veldin. But it is not nesecerally in the end! It could be the beginning. After all there were some enemies in Veldin, weren\'t there? So they were already there and Ratchet and Clank were trying to escape. It is just a theory but there are some alternations in the plot, minor but still alternations. Anything is possible, we could even visit Drek's planet!