Shockwave and Grimlock are a nice inclusion, and I’ll look forward to seeing the toys revealed at some point. Nightshade sounds like a brand new character (like Twitch), but I haven’t heard of before. I’m really looking forward to Twitch, and hopefully he/she will be equally as cool. I think its good Hasbro are creating the odd new character, rather than just rehashing old ones. Kinda like to see Windblade though featured in Earthspark. You can never have enough Windblades.
On the lookout for MISB Headmaster Highbrow, Takara or Hasbro. I'm sure I could make you a sweet deal!