Aeolus-2: Status of pre-development activities. - Ciapponi, Alessandra; Porciani, Massimiliano; Wernham, Denny; Letty, Ronan Le; Liu, Nicole; Parzianello, Giorgio; Nelms, Nick; Krisna, Trismono Candra; Heliere, Arnaud; Boyes, Ben (EPJ Web of Conferences, 2026)