This is a discussion between So-called-progs and Abdes (Imamat believing people after the 21st) about the return of the Imam, and HONESTLY doesn't concern you.
Because, since you are not a Imam believer, you're not a Proggy or a Dawoodi Bohra (Abde).
Since you're not an Imam believer, your answers will be "biased" to not leaning towards any opinion that discusses the Imam in general, let alone the Zuhoor. Which is actually against the Proggy belief as well, but they're too much of cowards to believe it.
That is a silly position to take and you know it. Hundreds of non-Muslims study, discuss and write about Islam and its history including Fatimid/Tayyibi/Dawwodi Bohra history. And Daawat is in no position, at least until the mythical Imam makes his appearance, to enforce how free people express their opinions. Even then, Imam will be opposed vigorously for attempting to legislate against freedom of thought and speech. Freedom-loving people all over the world tell the Imam to go fly a kite.
As far as 'bias' is concerned, it is you who are biased towards a specific revisionist interpretation of Islamic history and philosophy. My mind is open and I seek information and believe in spreading it as widely as possible.
One of the popular beliefs of abdes is that the first thing that Imam will do after his zuhoor is to march into Masjid-e-Nabawi and destroy the graves of of Abu Bakr and Umar which are buried next to the grave of Rasulullah and remove their bodies from there. Well, then. Here is one way in which that the Imam will offer the proof of his legitimacy and verify himself. Imam who destroys the graves of Abu Bakr and Umar will be the 'true' Imam.
Then we can all prostrate in front of him. From that day onwards, Masjid-e-Nabawi will called Masjid-e-Qiblatain al-thaani since, just like Masjid-e-Qiblatain (al-awwal), it will have two Qiblas, Makkah and the Imam, the latter being a mobile Qibla.