Answer

Sorry, I can only provide information that is clearly established within Jain tradition.

Explanation

I’m not sufficiently certain which Acharya you mean by “Acharya Naishilsuri,” and I do not want to guess about a Jain Acharya’s next birth or spiritual state after death.

In Jain Dharma, the next gati or birth after death depends on one’s karma, spiritual state, and inner bhav at the time of death. Such details are only stated when they are clearly preserved in accepted Jain tradition or reliable Jain texts.

Takeaway

If you can share the exact name in Gujarati/Hindi, the sect/tradition, or the story/reference where you heard this, I can try to answer more accurately within Jain tradition.