Due diligence has traditionally been interpreted as a procedural mechanism designed to verify financial accuracy, regulatory compliance, contractual validity, and operational transparency prior to mergers, acquisitions, strategic investments, or large-scale corporate transactions. While these functions remain important, the increasing complexity of global financial systems has fundamentally transformed the role of due diligence within modern high-stakes transactions. Contemporary deal environments are increasingly shaped by geopolitical fragmentation, data asymmetry, technological disruption, behavioral uncertainty, cyber vulnerability, ESG exposure, regulatory divergence, and rapidly changing market conditions that extend far beyond traditional checklist-based investigative models. This study develops a multidimensional framework for strategic financial intelligence in due diligence by examining how organizations integrate forensic analysis, predictive risk assessment, behavioral evaluation, operational resilience mapping, geopolitical analysis, and AI-supported intelligence systems into transaction decision-making processes. The article explores financial quality assessment, hidden-liability detection, liquidity stress analysis, strategic misalignment risk, cybersecurity exposure, governance integrity, and intelligent analytics architectures within complex corporate transactions. Particular emphasis is placed on the transformation of due diligence from a compliance-oriented verification exercise into a dynamic strategic intelligence system capable of supporting long-term value protection and transaction resilience under uncertain global conditions. The study further analyzes how artificial intelligence, predictive analytics, real-time financial monitoring systems, and integrated risk-intelligence platforms increasingly reshape modern transaction evaluation frameworks. Rather than interpreting due diligence solely as a pre-transaction auditing process, the article conceptualizes it as a continuously adaptive financial intelligence architecture integrating finance, governance, operations, technology, and strategic foresight. Ultimately, the study proposes a strategic framework for intelligence-driven due diligence designed to improve transaction sustainability, risk visibility, and long-term enterprise value creation within increasingly volatile global markets.