How to open a link of node in custom region?
You can create your block programmatically as explained in this post, and then in the block_view function, add the content of your node as the block's content, for example:

$imported_node = node_load($imported_nid);
$block['title'] = $imported_node-&gt;title;
$block['content'] = $imported_node-&gt;body; 


You will have to tweak the values to fit your node content, structure you want to output