I'd say the short answer to "is it possible to accept them again in the near future" is no (where "near" is in the next six months).
I agree with Maged-- before enabling new opcodes, I'd like to see a peer-reviewed academic-style paper that works through the security implications of the existing set of opcodes and gives a nice framework for thinking about new (or disabled old) opcodes. Doing that is way outside my own personal level of expertise; I know only enough about designing secure algorithms to know that I have no idea whether or not re-enabling OP_XOR would have security implications for bitcoin.
Same goes for enabling nLockTime / transaction replacement, although I suspect that proving that transaction replacement doesn't open up any subtle attacks may be harder than proving security properties of opcodes.