According to
luchtvaartnieuws.nl (sorry, dutch only) a Ryanair spokesman said that they will anounce new routes to Eindhoven and Maastricht today. He also said that the expansion in Maastricht will be bigger then the one in Eindhoven. So I suspect that they will (indeed) announce their Valencia base tomorrow, including a daily flight to Eindhoven. As of yet I do not have a clue what the new routes to Maastricht might be. Will be interesting to see!