After successfully completing this quest, the Siege Perilous became a portal between Otherworld and Krakoa, and citizens of both realms could traverse it safely.

Source: https://www.cbr.com/nightcrawlers-hunt-mcu-artifacts-marvel/

Like Hercules, they’d also be good options for their own Disney+ series and could perhaps be part of the slate in Phase 6. This could then also feature Merlyn and his daughter Roma, who are leaders of the Otherworld.

Source: https://screenrant.com/marvel-alternate-dimensions-mcu-explore-after-quantum-realm/