How much new content? Wikipedia just says new weapons and missions and stuff. Hardly seems like enough to warrant a whole new retail package. If this were a radical new entry that just re-used some old assets from DR2 (Like AC Brotherhood) then maybe it
would make sense but from what I gathered this is 'DR2: Frank West Edition'. As it is Off The Record looks to be re-using about 90% of the assets from DR2. And I'm betting that this release won't include the two DLCs.
Unless happens to be getting a budget release like the GTA DLC and that zombie thing for Red Dead. If that is the case then ignore all I said
I suppose it depends on how you define 'Budget' its just shy of 23£ on Shopto. From what i can gather theres whole new story, missions, area's, bosses, combo weapons, normal weapons, PP system, survivors etc etc. Also tehnical stuff to make the game load
faster and other things, though really they should update DR2 with that stuff aswell.
As for the DLC's im guessing you mean the two stand alone XBLA titles? I honestly dont know, its never been mentioned.