Transavia do indeed appear to be opening a seasonal base at MAN.
In GDS, flights loaded so far:
Las Palmas Mondays
Tenerife Tuesdays
Fuerteventura Wednesdays
Lanzarote Thursdays
Palma Mallorca Saturdays
Cannot find Fri/Sun flights just yet, but 1 B737-800 to be based from November 3rd 2013.
Flight times can be given on request, but no flight numbers are loaded yet, as all but the PMI flights have TO0 as a flight number.