If you mean another country getting into direct military conflict with Russia, as long as any conflict stays confined to Ukraine then that is very unlikely to happen. Ukraine is neither an EU nor a NATO member, it has no binding security agreements.
But this is history being written, I don't know what the endgame and future consequences of what has happened and yet to happen will be for the region. The largest country on earth has invaded the largest European country. Even if this stays confined to just Crimea, the implications for security and relations in Europe and between Russia and the West in general are massive, make no mistake.