Howling:The similarities with major monster comebacks...

I have noticed the similarities:

1st Series Monster Comeback: Daleks 2nd Series Monster Comeback: Cybermen 3rd Series Monster Comeback: The Master 4th Series Monster Comebacks: Sontarans and Davros

1st Doctor's Ultimate Enemies: Daleks (5 times including Mission to the Unknown) 2nd Doctor's Ultimate Enemies: Cybermen (4 times) 3rd Doctor's Ultimate Enemies: The Master (8 times) 4th Doctor's Ultimate Enemies: Sontarans and Davros (Twice each!)

See what I mean? What's in store for Series 5? The Mara? Return of the Master? Series 6? Sil and the Mentors? The Valeyard? Series 7? Fenric? Gods of Ragnarok? Even better, how about The Rani? Please reply!