Is the show of force by the Russian Air force is a 1 shot wonder or are they restocked and recocked for the long haul

Time will tell. I have a feeling that their resources are not as deep as they would have us believe.

I think they have held in reserve a substantial arsenal, but I have been surprised at some of it also.

I would note that the Russians have only 35 TU-160s in service, most of them in a condition that renders them barely operable. They've recently upgraded some of them - this sortie may well have involved the entire force. These are 70's vintage aircraft, loosely on par with the B-1A. The TU-22M3 is from the 60s, the Bears are even older. They can fly them. They can use them to effect. But at the end of the day, I am not impressed.
To answer the question, I think that the Russians are just about tapped out in what they can project forward. It is worthy of note that operations in Ukraine have been awfully quiet while their adventures in Syria are underway. I don't think that is coincidental.