More Formal Options:
* "Will John Doe lead the invocation?" This is a direct question that is clear and concise.
* "John Doe will lead the invocation." This is a statement that is more formal and direct.
Informal Option:
* "John Doe is leading the invocation." This is a more informal way to express the same idea.
The best option will depend on the specific context and the desired level of formality.