Here are a few options for a formal title, each with a slightly different nuance.
Option 1 (Most Direct and Standard)
Call for Papers: JMIR Metascience and Research Integrity Seeks Submissions on Misinformation in Scientific Publishing
Option 2 (More Formal and Announcement-Style)
Announcement: Call for Submissions on Misinformation in Publishing for the New JMIR Journal of Metascience and Research Integrity
Option 3 (Emphasizing the Journal’s Mission)
JMIR Metascience and Research Integrity Issues Call for Papers on Misinformation in Scholarly Publishing
Option 4 (Concise and Professional)
Call for Papers: Addressing Misinformation in Scientific Publishing in JMIR Metascience and Research Integrity
I recommend Option 1 for its clarity and directness, aligning with standard academic publishing conventions.