Well...There are a few rumors running about...ummm...about the name of Skylanders 5. Interesting...and it kinda follows your hints...sorta....
I won't say what it is to preserve the potential surprise. (I'm sure internet savvy folk such as yourselves can hunt it down if you want)
I think Activision is pretty locked into making the reveal before E3. Personally, I like that they have held back so far. Last year, didn't work out so well. They made the reveal early but weren't willing or prepared to add or elaborate on anything a few weeks later when E3 hit. Which rendered E3 kinda ...useless, in my opinion...from a Skylander point of view. I would prefer them to give out the name, if they must, prior to E3 but nothing else. Then the first look we get will be at E3! Makes it an EVENT!!
Case in POINT: TODAY....!
TODAY!, I finally went in and defeated Kaos in TRAP TEAM! My son, went a little early and beat Kaos in his game only@2 weeks ago.
(We each save our own version: He likes to race thru a level like he's being chased
(COINS..?!? No TIME, DAD!! LEAVE 'EM...LETS GO! LETS GO!!!
) I like to go slow, explore, find each Treasure, Soul GEM, etc.-All stars on a level is my win! If we are on his game, I follow his lead. My game, we reverse it.)
Bottom line, as opposed to too early, I would prefer them to reveal much later, skipping even E3 if need be. Let the other titles trip over each other, Skylanders is the LEADER. Show some confidence, pick the way and time you want to release.
They are just coming to the end of the Trap Team releases...Its a long time until October/RELEASE DATE.