Rockstar GTA 6 launch marketing campaign begins in summer 2026: corroborated (confidence 65)

Slice 28V.5B held corroboration attach via rss_atom_feed:pushsquare_news_feed (tier_2 major_press). Verdict, confidence_score, and confidence_band held; evidence breadth only. Reason: major_press first; direct marketing timing support From corroborated to corroborated. Confidence 65. Evidence added: 1 new source.