4.2 to 4.3 (Fukua) was about 12 weeks. 4.4 to 4.5 (Annie) was 6 weeks. So perhaps expect 5.1 (full, all relics release for Umbrella) to be mid-June? 

Gotta say both Diamond PF 30% cutoff were lower than what I expected (20m Eliza, 15M Annie)