Brazil is indeed booming in many aspects, but one that is crucial for F1 in my view is perhaps the most neglected thing in this country: technology. All aspects of it, starting with basic math and science education to form engineers for instance, or simply the existence of any tech firm that would benefit from associating its name with F1 or use that as a “testing / development bed” for its products.
Many teams in F1 are no longer solely a racing team – they are tech companies and / or tied to automotive industry (e.g. McLaren, Ferrari, Williams, Mercedes, Caterham, Marussia). The others (Red Bull, Toro Rosso, Force India, Lotus, Sauber, HRT) are international business plataforms for their funding firms.
The first of above “avenues” for a Brazilian F1 team is, in my opinion, not viable due to the aforementioned lack of technological aptitude.
The second is maybe not as interesting as it may sound – the brazilian grownt is largely due to the internal market, what makes Formula 1 and its inherent global character less appealing. Brazilian firms who would be interested in enhancing its global position via Formula 1 association are limited in number (Petrobras, Vale and OGX come to mind, but that’s all).