Of course it is possible, and it will happen, just not at the same time, not the same (exact) cause, nor with the same places, and possibly with different alliances.
Who's next in line after Franz Ferdinand? More to the point, is that person planning to make any public appearances in places where Slavic nationalists or anarchists could easily blend in with the crowd? If so, we'll get an assassination attempt pretty quickly.
It will happen, my bet would be that it would begin at some point in the 1920s.
We might see Britain siding with Germany in this later war, their relations were improving since the end of the Naval Arms Race, only hampered by OTL WW1. With it delayed Anglo-German relations would improve even more.