SpaceX doesn't sound as interested as Boeing, Lockheed, and small launcher companies Vector (KSC LC-48) & Microcosm/Scorpius.

More bad news for Europe's ArianeSpace.

One also wonders if this would host future US Space Force non-military launches.

Bloomberg...

Pence Is Said to Lead U.S-Brazil Talks on Rocket Launch Site

(Bloomberg) -- Talks over U.S. commercial use of a rocket launch site in Brazil are advancing and will take center stage during Vice President Mike Pences visit to Brasilia next week, according to three people familiar with the matter.

While a final agreement is unlikely during his visit, progress has been made in discussions to give U.S. personnel access to the Alcantara base in the north-eastern state of Maranhao, while ensuring sovereignty safeguards to Brazil. Both sides have made concessions and things are moving forward in a positive way, the people said, asking not to be named because talks arent public. Discussions are now focused on the financial end of the deal and on technological details, they added.

Alcantaras proximity to the equator makes it cheaper to launch rockets. The base could generate revenue of up to $1.5 billion per year, according to the Brazilian defense ministry. All previous attempts at commercially exploring the base have failed. In 2015 Brazil ended a partnership with Ukraine to develop a launch vehicle at Alcantara, citing Ukraines financial problems. A previous cooperation with the U.S. was rejected by Congress for alleged national sovereignty violations.

"Pences trip will boost efforts to reach an agreement that would be of obvious interest for both parties," Brazils foreign minister Aloysio Nunes Ferreira told Bloomberg, confirming space is a top topic in the agenda. He said that while "you cannot compromise on sovereignty" a final deal would enable both sides to protect their industrial and technological secrets.

U.S. administration officials familiar with preparations for Pences visit said strategic cooperation on a space partnership between the U.S. and Brazil will be an important part of the trip and a topic of a working lunch Pence will have with President Michel Temer. Pence heads the National Space Council and is seeking to expand the councils work with international space partnerships. No announcement related to Alcantara was expected during the visit although it is likely to be a subject of discussion, officials said.
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