What about the Events Calendar for top altcoins?
It could be filled with dates taken from project's roadmaps for top 20-50-100 alts.
That calendar would provide announced events, data releases from devs. Then keep it updated, confirmations, reveiws. Guess it would suit for busy guys buying dosens of alts in a day.
Here is template for WP. I have not used it yet, so no suggestion about functionality.
https://theeventscalendar.com/