Board Thread:Theories/@comment-17499145-20170509021147/@comment-32289055-20170627005413

Dina said that even before Founding Titan runned away the 8 Titans were tored by different clans(86p31).

Marley government will recruit few to inherit the power of seven Titans. (86p37+38)

Eren Krueger said that no matter the age Attack Titan has always moved ahead, seeking freedom(88p43).

Grisha Yeager had Attack Titan and maybe even a Founding Titan in the day when Marley wanted to give 7 Titans to the next generation.

Simple as that. 9th was not showed yet. Marley might have 5 Titans. Island have 4 Titans.