Sinbad evolution materials and existing REM card buffs: http://pad.gungho.jp/member/collabo/sunday/160422_sunday_sinka.html
This REM used to have a higher chance of getting gold eggs due to the ratio of the rarity.
4 ->10 4-star silvers
4 -> 8 5-star golds
2 -> 4 6-star golds
Out of all the previous cards, I see Ushio & Tora(6-star) and Lum(5-star) being used the most, mainly in Arena videos. For the new cards, I think the most interesting card is Sesshomaru, the 6-star card, being a good leader pairing for the latest dark MP Flower cards, Xin Hua. The other cards aren't that good IMO with the exception of Sinbad (another new 6-star) being not a bad leader while the rest will probably be useful for skill inheritance.
I'm a fan of manga but never actually checked out these series much other than watching some Inuyasha anime. No must-haves as usual for most Collab REM, this is probably more for the respective manga series fans.