According to https://developer.atlassian.com/display/JIRADEV/View+Issue+Page+Locations it is possible to add a web panel with custom content on the right side of the issue view screen.
I would like to add a web panel with custom content in the main view issue area like
How can I achieve this in a v2 plugin?
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I think you need to add location="atl.jira.view.issue.left.context" and weight should be declared accordingly. You go through atlassian-plugin.xml in your jira-view-issue-plugin(bundled plugins).
<!-- Details panel -->
<web-panel key="details-module" location="atl.jira.view.issue.left.context" weight="100">
<resource name="view" type="velocity" location="viewissue/detailsblock.vm"/>
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