An Unexpected Journey, or the morning after

[Rhod the Red]

Probably, yes. Unless a scene will be given showing the Necromancer reviving him after he dies in a cave or intervening to prevent death or something like that.

When was it implied that Sauron resurrected him?

The juxtaposition of the rise of a Necromancer & the re-emergence of an Orc leader Thorin assumes he killed in battle. That implies Souron revived the Orc at some point, to help create trouble in the Wilderland, etc. Hopefully PJ ensures more coherency on this issue in Hobbit P2, etc.

The same with the reference in the White Council meeting that the Witch King was *killed* & buried, despite the inclusion of Glorfindel's prophesy of him not killable 'by any living Man' in the Return of the King film