Will The Flash Comic Con 2025 feature any panels or discussions about the future of 'The Flash' in DC's cinematic universe?

It's possible, but not guaranteed. Major Comic Cons often serve as platforms for studios to announce new projects or provide updates on existing ones. If DC has plans for future 'Flash' related content, The Flash Comic Con 2025 could be a venue for revealing some information, but this depends on DC's marketing strategy.