Possibly you're familiar with this paper, but it lists studies investigating the success of reintroductions/translocations involving six small cat species (Canadian, European, and Iberian lynx; bobcat; European wildcat; and mountain lion):
1) Jule, K. R., Leaver, L. A., & Lea, S. E. (2008). The effects of captive experience on reintroduction survival in carnivores: a review and analysis. Biological Conservation, 141(2), 355-363.
Vis-à-vis wildcats, Highland Wildlife Park have an off-show facility to breed them under semi-natural conditions, which will hopefully select for individuals suited to eventual release. This is part of the Scottish Wildcat Action project. As I understand it, mortality on roads was the main problem for continental wildcat reintroductions. I haven't read it, but see:
2) Hartmann, H. (2006). Reintroduction of captive-bred wildcats in Germany. In Iberian Lynx Ex-Situ Conservation Seminar Series: Book of Proceedings (p. 135).
And, finally, a couple of papers on lynx. Whilst results have been mixed, the ongoing Iberian lynx programme is very promising.
3) Linnell, J. D., Breitenmoser, U., Breitenmoser-Würsten, C., Odden, J., & von Arx, M. (2009). Recovery of Eurasian lynx in Europe: what part has reintroduction played. Reintroduction of top-order predators, 72-91.
4) Devineau, O., Shenk, T. M., Doherty, P. F., White, G. C., & Kahn, R. H. (2011). Assessing release protocols for Canada lynx reintroduction in Colorado. The Journal of Wildlife Management, 75(3), 623-630.