The Freemakers will get a cameo.
- Well the Freemakers didn't show, but the "Galaxy's best Emperor" Mug returned, to the same reaction it received before.
The original holiday special will get a Take That! moment or two.
Or twenty.
http://tvtropes.org/pmwiki/pmwiki.php/WMG/TheLEGOStarWarsHolidaySpecial
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Or twenty.