Implicating gundam_age -> gundam.
Reason: Latest series in the franchise.
I'd also like to suggest implicating sd_gundam_online -> gundam and sangokuden -> gundam.
Finally I like to to remove the implication advance_of_zeta -> zeta_gundam. The relationship between the two series isn't as close I thought so I think implicating advance_of_zeta -> gundam would suffice.
Updated by a moderator