35 ton Firebee for a Light missile boat. Extinct due to Succession Wars--well, except two. Currently only the Huginn is similar, but it is behind paywall.
http://www.sarna.net/wiki/Firebee
55 ton Alfar for the Medium slot. Extinct due to difficulty of repairs. It is pretty much a slightly inferior Shawk but perhaps PGI can salvage it by giving it an actual Medium mech size. The mech Lynx is an energy only alternative choice.
http://www.sarna.net/wiki/Alfar
http://www.sarna.net/wiki/Lynx
70 ton Dragoon for ECM Heavy. Extinct thanks to Kerensky. Those hardpoint locations screams "CW cheese mech".
http://www.sarna.net/wiki/Dragoon
85 ton Crockett for the Assault slot. Extinct due to "lostech". Comstar turns out having a few of them but for the rest of the Inner Sphere it was extinct. It is not a spectacular mech but IS is due for another 85 ton Assault.
http://www.sarna.net/wiki/Crockett
And for those who had purchased the highest tier pack, PGI can give the now extinct 70 ton BattleAxe for free. I know at least some of you want the good old BattleAxe. One variant has 5 missile slots.
http://www.sarna.net/wiki/BattleAxe
*edit* As Joe mentioned, the 75 ton Hammerhands is also a good candidate for this pack. Since Harmony Gold still denies us the Warhammer, this mech is the next best thing.
http://www.sarna.net/wiki/Hammerhands
Edited by El Bandito, 10 April 2015 - 06:54 AM.