This many rangers haven't been assembled together since the Gaoranger vs Super Sentai 25th Anniversary movie. 10 year later Goukaiger marks the 35th Super Sentai series, and it doesn't look like there are going to disappoint.
BTW, as for the naming situation between Gokaiger and Goukaiger - I'm going to wait until TV-Nihon picks a spelling to go with. For now I'll stick with "Goukaiger" as the spelling - but will change it once the first episode releases.
Goukaiger Group Images
You can find these image added here: Goukaiger Group Images