According to both voice actors, the reason neither will reprise their roles with the Resident Evil 2 remake, is due to the company choosing non-union actors to play Leon and Claire.
The Resident Evil 2 Remake project was approved in August 2015 after Resident Evil HD Remaster producer Yoshiaki Hirabayashi pitched it to Capcom.
Here’s a bit of news we missed due to all the E3 2017 hubbub last week: Alyson Court will not be providing the voice for Claire Redfield in the Resident Evil 2 remake, and neither will the voice actor for Leon Kennedy.
The Canadian voice actors union, ACTRA, is currently standing in solidarity with its US counterpart.