Answer

No. In Jain tradition, Krishna is not considered the next Tirthankar.

Explanation

In Jain Dharma, Krishna is understood as a Vasudev figure, not a Tirthankar. A Tirthankar is a fully enlightened spiritual teacher who establishes the Jain path for others. Krishna does not hold that role in Jain tradition.

Also, in the current half-cycle of time (avasarpini), the 24 Tirthankars have already appeared, and Lord Mahavira was the last Tirthankar of this cycle.

Spiritual Understanding

Jainism keeps a clear distinction between:

• Tirthankars: spiritual saviors and path-makers
• Vasudevs: powerful noble figures, but not Tirthankars

So Krishna has an important place in Jain cosmology, but not as a Tirthankar.

Takeaway

If you are asking from the Jain view, the correct answer is: Krishna is not the next Tirthankar; he is not a Tirthankar at all in Jain tradition.