The France-based media giant is also thinking about splitting off other business units.
CEO tells Campaign he is optimistic, after reporting 4.5% growth in Q3, ahead of some key rivals.
French agency group expects organic revenue to be ahead of most rivals.
Q1 revenues dropped 0.8% on an organic basis.
Vivendi describes French media report as "unfounded".
Top news, insights and analysis every weekday
Sign up for Campaign Bulletins