Asalaam Alaikum wr wb
Of course the Qaim [as] will have great knowledge and knowledge that will bewilder our minds but surely there is more to this , how do we recognise the Hujjah of Allah swt?
I believe history always repeats itself and in the past we had great knowledgable Prophets [pbut] and Imam [as] but many still rejected them so what more can we look out for to find the Hujjah of Allah swt?
Also brothers and sisters i came across this hadith , Abu Abdullah (as) said: The Qa'im shall not rise, until twelve men come forth and say that all of them have seen The Qa'im, but people will belie them.- Al Ghayba by Al No'mani p285 – The Righteous servant p29, 30