In think some MNOG 1 and 2 moments like "Whisper Club", "Kopeke is the NSA" and the "Miru is a dumb mask/your face is a SKULL!!!" moment could be good ideas.
One could be a nod the Biocraft project with the different Minecraft skins of the TTV cast members that were involved with the project in a pose at the Kini Nui. Or they could all be doing something there that shows a little something they enjoyed about being part of TTV (Mesonak trying to get a rise out of Eljay, Eljay standing proud and tall or livid with rage at Meso's teasing with his Miru on his face, Prpldragon making a sign that is funny in the background, etc.)
I like the Overwatch idea and think it could work.