If he could, Will would have liked Dumbledore and Voldemort to remain locked in a standoff until he reached the Supreme Realm.
After all, his plans needed time. The longer this dragged on, the better.
But that was no longer possible. Dumbledore had shown his hand, and Voldemort had gone mad for some reason, rushing to settle everything.
With matters as they were, Will had no choice but to make major changes to his plan.
Voldemort clearly would not last that long.
That left Will too little time to gather faith or reach a higher realm. He had to find another way.
And so Will settled on a path: become the "true Chosen One."
Rather than let Dumbledore or Harry finish off Voldemort, he would make sure the entire Wizarding World knew that he was the one who had done it.
Tom Riddle was going to die anyway. As a professor, he might as well use his life one last time to pave a path to greater heights for his student.
According to the plan, before the end of sixth year,
Dumbledore would "die" in an attack by Snape, Harry Potter would be "gravely wounded" fighting Snape, and Scrimgeour would fall to Voldemort.
Voldemort's shadow would hang over the entire Wizarding World of England. Then Will would step forward, kill Voldemort, tear through that shadow, and bring hope back.
When the time came, the Ministry of Magic would spare no effort in praising Will and raising him to prominence.
Then Will could stand in the public eye and receive their adoration, gathering faith for himself.
He only needed Dumbledore to stay away at the crucial moment. For that, Will needed someone to keep him occupied.
And he happened to have just such an ally: the man who hoped Will would