:V CERBERUS.
Edit: This was somehow unlocked as I just got able to post while going through, before it was locked...so I might as well add now. All text below this editing message was added shortly after the original post.
Hehe...Burn Kerberous much? Only similarity is the creature (or in this case, the constellation of the beast) - Kerberous/Kerberos is another name for Cerberus (I first knew about Cerberus because of the game R-Type...). It sounds like opposition (in the anime case). It might not be surprising to see Hercules/Hercales as a Beyblade, as one of Hercales' Twelve Labours was to destroy Cerberus, but he didn't in the end. Plot formation, maybe?
(I understand some of this stuff is worthy of going into Beyblade Random Thoughts, just guide which stuff goes there.)
As for three heads, it seems that the three-winged setup is in use again :V
Not trying to speculate that Hades will be the name for Hell when and IF it comes to Hasbro, but I wouldn't be surprised, either. The last thing we need, though, if there even is one, is a Beyblade with Charon somewhere - that completes the main roamers of Hades, Hades himself, his guardian dog Cerberus, and Charon - the one who (Edit 2) ferries fallen souls across that river in Hades (I forgot the name of it). Just a bit of derailing but on the topic of Cerberus/Hades and within Greek mythology.
Actually, that (the mythology), as a bit of trivia, is said to be how Perseus and Andromeda were put up in the sky as constellations. I'm sure you guys knew that from discussion on Gravity Perseus, though.
Plans for MFB release: Get 1 of each Beyblade type.
Balance: I'm not sure about this one yet.
Attack: Storm Pegasus 105RF or Lightning L Drago 100HF. Defense: Rock Aries ED145B Stamina: Flame Libra T125ES, Thermal Pisces T125ES or Earth Aquilla 145WD. (Yup, I loooove my Stamina in the original series, especially Pisces because that's my Zodiac constellation.)
For Explosion season, I plan to get Ray Unicorno D125CS, Galaxy Pegasis W105R2F or Meteo L Drago LW105LF. (yup, I favour the Attack-types in Explosion.)