diff --git a/pytest_mh/_private/marks.py b/pytest_mh/_private/marks.py
index 6224060..0ccd659 100644
--- a/pytest_mh/_private/marks.py
+++ b/pytest_mh/_private/marks.py
@@ -13,6 +13,8 @@
     from .multihost import MultihostRole
 
 
+# TODO: Should I look at the plugins, like  mark.importance and create a single_run mark? 
+
 class TopologyMark(object):
     """
     Topology mark is used to describe test case requirements. It defines:
diff --git a/pytest_mh/_private/plugin.py b/pytest_mh/_private/plugin.py
index 02611da..bfddd89 100644
--- a/pytest_mh/_private/plugin.py
+++ b/pytest_mh/_private/plugin.py
@@ -320,6 +320,20 @@ def pytest_collection_modifyitems(self, config: pytest.Config, items: list[pytes
         # Sort required host by name to provide deterministic runs
         self.required_hosts = sorted(required_hosts_set, key=lambda x: x.hostname)
 
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_collection_modifyitems_single_run(self, config: pytest.Config, items: list[pytest.Item]) -> None:
+        """
+        TODO: Write single run hook
+        
+        1. Iterate through items, create list with test case name and topology
+        2. If test case name is new, add to list
+        3. If preferred topology parameter is defined, add to list or replace item in list
+        """
+        data: MultihostItemData | None = None
+        selected: list[pytest.Item] = []
+        skipped: list[pytest.Item] = []
+        mapped: dict[str, list[pytest.Item]] = {}
+
     @pytest.hookimpl(hookwrapper=True)
     def pytest_collection_finish(self, session: pytest.Session) -> Generator:
         # Log required hosts